1.

Waves `y_(1) = Acos(0.5pix - 100pit)` and `y_(2)=Acos(0.46pix - 92pit)` are travelling along x-axis. (Here `x` is in `m` and `t` is in second) (2) The wave velocity of louder sound isA. 100 m//sB. 192 m//sC. 200 m//sD. 96 m//s

Answer» Correct Answer - C
Speed of wave,
`v = (omega)/(k)`
`v = (100 pi)/(0.5 pi)` or `(92 pi)/(0.46 pi) = 200 m//s`.


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